Campbell-scientific OBS500 Smart Turbidity Meter with ClearSensor Tech Manual do Utilizador descarregar pdf (Página 11)

OBS500 Smart Turbidity Meter

with ClearSensor™ Technology

1. Introduction

The OBS500 submersible turbidity meter is designed for general pressure

measurements. The OBS500 uses ClearSensor™ (U.S. Patent No. 8,429,952),

an anti-fouling scheme that uses a shutter/wiper mechanism to protect and

clean the optics and a refillable biocide chamber to allow biocide to leach out

over the optics continually while in the closed position. It uses the SDI-12 or

RS-232 communication protocol to communicate with an SDI-12 or RS-232

recorder simplifying installation and programming. It can also be used as an

analog sensor with 0 to 5 V output.

Before using the OBS500, please study

• Section 2, Cautionary Statements

• Section 3, Initial Inspection

• Section 4, Quickstart

2. Cautionary Statements

• READ AND UNDERSTAND the Precautions section at the front of this

manual.

• The OBS500 needs to be sent in after two years or 70,000 cycles for drive

shaft seal replacement. (See m8! command in TABLE 7-7.)

• The sensor may be damaged if it is encased in ice.

• Damages caused by freezing conditions will not be covered by our

warranty.

• Campbell Scientific recommends removing the sensor from the water for

the time period that the water is likely to freeze.

• Sand grains between moving surfaces can jam the shutter/wiper. For high

sediment load and large grain size installations, operate the OBS500

normally open to minimize the chance of sand grains jamming the

shutter/wiper (see Section 7.7, Operation in High Sediment Loads and

Sandy Sediments).

• Minimize temperature shock. For example, do not take sensor from sunny

dashboard and immediately drop it in frigid water.

• Ensure that obstructions are not in the backscatter sensor’s large field of

view. See Section 4, Quickstart, for more information.

• Maximum depth for the OBS500 is 100 meters.

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Campbell-scientific OBS500 Smart Turbidity Meter with ClearSensor Tech Manual do Utilizador Página 11